Institution: | 1. Department of General Surgery, Hebi Coal Industry (Group) Co, Ltd, General Hospital, Hebi City, Henan Province, China;2. Department of Joint Trauma Orthopaedics, Weifang Yidu Central Hospital, Weifang, China;3. Department of Minimally Invasive Gastrointestinal Surgery, Henan Tumor Hospital, Zhengzhou City, Henan Province, China |